The most common and most likely answer to this crossword clue is the 5 letter word SWAMI
I've seen this crossword clue in The Times
S
W
A
M
I
More clues leading to the result SWAMI
- How to address Hindu dignitary in the morning in Westminster?
- Male teacher has son with friend
- Spiritual guide is holding belly back
- Teacher’s whiskey drunk by Laplander
- Teacher was giddy one
- Hindu instructor moved through water against current
- Holy man raising current crops — for birds
- Teacher went through water to land on island
- Trod water, perhaps, with one teacher
- Hindu teacher moved across the Ganges perhaps before one
Buddy explains!

The straight part
We know that "teacher" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case teacher = swami.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does SWAMI mean?
SWAMI noun- (used as a title) A Hindu ascetic or religious teacher.